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Cornerstone · Grades 3–5 Keystones #1 17 November 2013 Skills week 1 of 7
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Five GCSE retrieval questions · 17 November 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄6 + 6⁄8

    Answer: 17⁄12
  2. 2. Algebra Two-step equations

    Solve: 5x - 5 = 20

    Answer: x = 5
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 12cm and 16cm

    Answer: 20cm
  4. 4. Ratio Sharing in a ratio

    Divide 90 in the ratio 2:1:3

    Answer: 30, 15 and 45
  5. 5. Statistics Mean

    Calculate the mean of: 32, 11, 44, 7, 21, 36, 45, 41. Give your answer to 2 decimal places

    Answer: 29.63

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